| Dec 31,
2018 | Dec 31,
2019 | Dec 31,
2020 | Dec 31,
2021 | Dec 31,
2022 | Dec 31,
2023 | Dec 31,
2024 |
|---|
| Cash and Cash Equivalents, at Carrying Value | 42 | 31 | 37 | 95 | 99 | 108 | 104 |
|---|
| Cash and cash equivalents at end of year | - | - | 6 | 7 | 6 | 10 | 27 |
|---|
| Marketable equity securities | - | - | 5 | 1 | 0 | 0 | 0 |
|---|
| Trade accounts receivable, net of allowance for doubtful accounts of $8,086 and $6,574 at December 31, 2024 and 2023, respectively (including accounts receivable related to variable interest entity of $250 and $275 at December 31, 2024 and 2023, respectively) | - | - | 61 | 52 | 55 | 62 | 62 |
|---|
| Inventory, Net | 10 | 17 | 17 | 18 | 16 | 15 | 12 |
|---|
| Prepaid expenses | 6 | 6 | 5 | 5 | 7 | 16 | 10 |
|---|
| Other current assets | 4 | 2 | 3 | 22 | 6 | 5 | 8 |
|---|
| Other current assets of discontinued operations | - | - | - | - | 39 | 13 | 4 |
|---|
| TOTAL CURRENT ASSETS | 98 | 113 | 134 | 200 | 228 | 230 | 227 |
|---|
| Restricted cash—long-term | - | - | - | - | - | 45 | 70 |
|---|
| Property, Plant and Equipment, Net, Ending Balance | 4 | 4 | 0 | 0 | 1 | 15 | 25 |
|---|
| Goodwill | 11 | 12 | 26 | 12 | 10 | 10 | 13 |
|---|
| Other Intangible Assets, Net | 6 | 7 | 12 | 4 | 3 | 3 | 2 |
|---|
| Deferred income tax assets, net | - | - | 5 | 4 | 6 | 5 | 7 |
|---|
| Other assets | 8 | 7 | 10 | 9 | 14 | 15 | 22 |
|---|
| Noncurrent assets of discontinued operations | - | - | - | - | 16 | 7 | 4 |
|---|
| Total assets | 147 | 156 | 187 | 229 | 278 | 331 | 371 |
|---|
| Accounts Payable, Trade, Current | 19 | 24 | 43 | 34 | 25 | 28 | 31 |
|---|
| Accrued Liabilities, Current, Total | 25 | 26 | 43 | 40 | 36 | 49 | 49 |
|---|
| Accrued Income Taxes, Current | 1 | 2 | 2 | 10 | 23 | 7 | 9 |
|---|
| Current captive insurance liability | - | - | - | - | - | - | 9 |
|---|
| Due to IDT Energy | 4 | 3 | 2 | 2 | 5 | - | - |
|---|
| Current liabilities of discontinued operations | - | - | - | 31 | 11 | 5 | 5 |
|---|
| Total Current Liabilities | 51 | 72 | 97 | 116 | 99 | 98 | 110 |
|---|
| Noncurrent captive insurance liability | - | - | - | - | - | 45 | 70 |
|---|
| Long-Term Debt, Excluding Current Maturities | - | - | - | - | - | - | 9 |
|---|
| Liabilities | 1 | 2 | 4 | 2 | 4 | 2 | 3 |
|---|
| Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent | - | - | - | - | 1 | 1 | 1 |
|---|
| Liabilities | 54 | 75 | 101 | 119 | 104 | 146 | 192 |
|---|
| Preferred stock, $0.01 par value; authorized shares – 10,000: Series 2012-A, designated shares – 8,750; at liquidation preference, consisting of 0 shares issued and outstanding at December 31, 2024 and 2023 | 20 | 20 | 20 | 20 | 8 | - | - |
|---|
| Common Class A | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Common Class B | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Additional paid-in capital | - | - | 141 | 143 | 147 | 156 | 159 |
|---|
| Treasury shares value | 2 | 8 | 10 | 14 | 19 | 23 | 37 |
|---|
| Accumulated Other Comprehensive Income (Loss), Net of Tax | 3 | 3 | 4 | 3 | 2 | 3 | 4 |
|---|
| Retained Earnings (Accumulated Deficit), Ending Balance | -54 | -60 | -57 | -29 | 49 | 60 | 65 |
|---|
| Total Genie Energy Ltd. stockholders' equity | 104 | 95 | 98 | 123 | 187 | 197 | 191 |
|---|
| Noncontrolling Interest, Before Receivable for Issuance of Capital Stock | - | - | - | - | - | - | -10 |
|---|
| Noncontrolling Interest, Receivable for Issuance of Capital Stock | - | - | - | - | - | - | -1 |
|---|
| Total noncontrolling interests | -11 | -14 | -12 | -12 | -13 | -13 | -11 |
|---|
| Common Class A | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Common Class B | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
|---|
| Ending Balance | 93 | 81 | 86 | 111 | 174 | 185 | 180 |
|---|
| TOTAL LIABILITIES AND NONCONTROLLING INTERESTS | 147 | 156 | 187 | 229 | 278 | 331 | 371 |
|---|